Partially unified indentation to two spaces rather than 3, 5, etc.

Hg-commit: 72aceb82fa10cae79a777f91c00d187d4e02f4f6

macros changed to static inline functions
output of example fixed for previous change to example

Hg-commit: 30b16dfe130e50978dcb99c50a8edfc8772fcf0f

Carefully replaced more '){' by ') {', added checker script

Hg-commit: a0037010be00b56a68354d942365c8f8df63198a

Carefully removed \t from src/sys/*

Hg-commit: 910eecdb2d9101d15fb5ee24738d9e5eca423f9a

merge c89 fixes from release 3.3

Hg-commit: 2d5593aa1623d18e813e8b6a59a156efae5212d9

fixed rest of mising CHKERRQ() fixed a few unused but set variables

Hg-commit: 4acc0881334451e4d784ba0aa3b37fae2f983d1f

removed trailing spaces from all files

Hg-commit: 1cfa55059afe46c5145e0e830cd797b97216abfb

added PetscOptionsGetView() and PetscOptionsRestoreViewer()

Hg-commit: 570011297d031dcce016710af35579cd6d354d6f

reorg of src/sys directory
directories that define objects now in the classes subdirectory
rename several confusing name directories

Hg-commit: b2612422c63ac4afe82112892d9efda808f3d601